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New low-level utilities to deal with pointers and iterators
This commit is contained in:
Ion Gaztañaga
59
include/boost/move/detail/iterator_to_raw_pointer.hpp
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59
include/boost/move/detail/iterator_to_raw_pointer.hpp
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//////////////////////////////////////////////////////////////////////////////
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//
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// (C) Copyright Ion Gaztanaga 2014-2015. Distributed under the Boost
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// Software License, Version 1.0. (See accompanying file
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// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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// See http://www.boost.org/libs/container for documentation.
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//
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//////////////////////////////////////////////////////////////////////////////
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#ifndef BOOST_MOVE_DETAIL_ITERATOR_TO_RAW_POINTER_HPP
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#define BOOST_MOVE_DETAIL_ITERATOR_TO_RAW_POINTER_HPP
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#ifndef BOOST_CONFIG_HPP
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# include <boost/config.hpp>
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#endif
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#if defined(BOOST_HAS_PRAGMA_ONCE)
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# pragma once
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#endif
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#include <boost/move/detail/iterator_traits.hpp>
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#include <boost/move/detail/to_raw_pointer.hpp>
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#include <boost/move/detail/pointer_element.hpp>
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namespace boost {
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namespace movelib {
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namespace detail {
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template <class T>
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inline T* iterator_to_pointer(T* i)
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{ return i; }
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template <class Iterator>
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inline typename boost::movelib::iterator_traits<Iterator>::pointer
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iterator_to_pointer(const Iterator &i)
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{ return i.operator->(); }
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template <class Iterator>
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struct iterator_to_element_ptr
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{
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typedef typename boost::movelib::iterator_traits<Iterator>::pointer pointer;
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typedef typename boost::movelib::pointer_element<pointer>::type element_type;
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typedef element_type* type;
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};
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} //namespace detail {
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template <class Iterator>
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inline typename boost::movelib::detail::iterator_to_element_ptr<Iterator>::type
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iterator_to_raw_pointer(const Iterator &i)
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{
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return ::boost::movelib::to_raw_pointer
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( ::boost::movelib::detail::iterator_to_pointer(i) );
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}
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} //namespace movelib {
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} //namespace boost {
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#endif //#ifndef BOOST_MOVE_DETAIL_ITERATOR_TO_RAW_POINTER_HPP
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168
include/boost/move/detail/pointer_element.hpp
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168
include/boost/move/detail/pointer_element.hpp
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//////////////////////////////////////////////////////////////////////////////
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//
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// (C) Copyright Ion Gaztanaga 2014-2017. Distributed under the Boost
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// Software License, Version 1.0. (See accompanying file
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// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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// See http://www.boost.org/libs/move for documentation.
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//
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//////////////////////////////////////////////////////////////////////////////
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#ifndef BOOST_MOVE_DETAIL_POINTER_ELEMENT_HPP
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#define BOOST_MOVE_DETAIL_POINTER_ELEMENT_HPP
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#ifndef BOOST_CONFIG_HPP
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# include <boost/config.hpp>
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#endif
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#if defined(BOOST_HAS_PRAGMA_ONCE)
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# pragma once
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#endif
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#ifndef BOOST_MOVE_DETAIL_WORKAROUND_HPP
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#include <boost/move/detail/workaround.hpp>
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#endif //BOOST_MOVE_DETAIL_WORKAROUND_HPP
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namespace boost {
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namespace movelib {
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namespace detail{
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//////////////////////
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//struct first_param
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//////////////////////
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template <typename T> struct first_param
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{ typedef void type; };
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#if !defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)
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template <template <typename, typename...> class TemplateClass, typename T, typename... Args>
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struct first_param< TemplateClass<T, Args...> >
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{
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typedef T type;
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};
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#else //C++03 compilers
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template < template //0arg
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<class
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> class TemplateClass, class T
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>
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struct first_param
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< TemplateClass<T> >
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{ typedef T type; };
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template < template //1arg
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<class,class
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> class TemplateClass, class T
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, class P0>
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struct first_param
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< TemplateClass<T, P0> >
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{ typedef T type; };
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template < template //2arg
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<class,class,class
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> class TemplateClass, class T
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, class P0, class P1>
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struct first_param
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< TemplateClass<T, P0, P1> >
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{ typedef T type; };
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template < template //3arg
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<class,class,class,class
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> class TemplateClass, class T
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, class P0, class P1, class P2>
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struct first_param
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< TemplateClass<T, P0, P1, P2> >
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{ typedef T type; };
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template < template //4arg
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<class,class,class,class,class
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> class TemplateClass, class T
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, class P0, class P1, class P2, class P3>
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struct first_param
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< TemplateClass<T, P0, P1, P2, P3> >
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{ typedef T type; };
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template < template //5arg
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<class,class,class,class,class,class
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> class TemplateClass, class T
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, class P0, class P1, class P2, class P3, class P4>
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struct first_param
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< TemplateClass<T, P0, P1, P2, P3, P4> >
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{ typedef T type; };
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template < template //6arg
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<class,class,class,class,class,class,class
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> class TemplateClass, class T
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, class P0, class P1, class P2, class P3, class P4, class P5>
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struct first_param
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< TemplateClass<T, P0, P1, P2, P3, P4, P5> >
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{ typedef T type; };
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template < template //7arg
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<class,class,class,class,class,class,class,class
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> class TemplateClass, class T
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, class P0, class P1, class P2, class P3, class P4, class P5, class P6>
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struct first_param
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< TemplateClass<T, P0, P1, P2, P3, P4, P5, P6> >
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{ typedef T type; };
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template < template //8arg
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<class,class,class,class,class,class,class,class,class
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> class TemplateClass, class T
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, class P0, class P1, class P2, class P3, class P4, class P5, class P6, class P7>
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struct first_param
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< TemplateClass<T, P0, P1, P2, P3, P4, P5, P6, P7> >
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{ typedef T type; };
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template < template //9arg
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<class,class,class,class,class,class,class,class,class,class
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> class TemplateClass, class T
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, class P0, class P1, class P2, class P3, class P4, class P5, class P6, class P7, class P8>
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struct first_param
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< TemplateClass<T, P0, P1, P2, P3, P4, P5, P6, P7, P8> >
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{ typedef T type; };
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#endif //!defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)
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template <typename T>
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struct has_internal_pointer_element
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{
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template <typename X>
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static char test(int, typename X::element_type*);
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template <typename X>
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static int test(...);
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static const bool value = (1 == sizeof(test<T>(0, 0)));
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};
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template<class Ptr, bool = has_internal_pointer_element<Ptr>::value>
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struct pointer_element_impl
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{
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typedef typename Ptr::element_type type;
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};
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template<class Ptr>
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struct pointer_element_impl<Ptr, false>
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{
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typedef typename boost::movelib::detail::first_param<Ptr>::type type;
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};
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} //namespace detail{
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template <typename Ptr>
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struct pointer_element
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{
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typedef typename ::boost::movelib::detail::pointer_element_impl<Ptr>::type type;
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};
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template <typename T>
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struct pointer_element<T*>
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{ typedef T type; };
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} //namespace movelib {
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} //namespace boost {
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#endif // defined(BOOST_MOVE_DETAIL_POINTER_ELEMENT_HPP)
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45
include/boost/move/detail/to_raw_pointer.hpp
Normal file
45
include/boost/move/detail/to_raw_pointer.hpp
Normal file
@ -0,0 +1,45 @@
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/////////////////////////////////////////////////////////////////////////////
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//
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// (C) Copyright Ion Gaztanaga 2017-2017
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//
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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//
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// See http://www.boost.org/libs/move for documentation.
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//
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/////////////////////////////////////////////////////////////////////////////
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#ifndef BOOST_MOVE_DETAIL_TO_RAW_POINTER_HPP
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#define BOOST_MOVE_DETAIL_TO_RAW_POINTER_HPP
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#ifndef BOOST_CONFIG_HPP
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# include <boost/config.hpp>
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#endif
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#if defined(BOOST_HAS_PRAGMA_ONCE)
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# pragma once
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#endif
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#include <boost/move/detail/config_begin.hpp>
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#include <boost/move/detail/workaround.hpp>
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#include <boost/move/detail/pointer_element.hpp>
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namespace boost {
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namespace movelib {
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template <class T>
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BOOST_MOVE_FORCEINLINE T* to_raw_pointer(T* p)
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{ return p; }
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template <class Pointer>
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BOOST_MOVE_FORCEINLINE typename boost::movelib::pointer_element<Pointer>::type*
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to_raw_pointer(const Pointer &p)
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{ return ::boost::movelib::to_raw_pointer(p.operator->()); }
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} //namespace movelib
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} //namespace boost
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#include <boost/move/detail/config_end.hpp>
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#endif //BOOST_MOVE_DETAIL_TO_RAW_POINTER_HPP
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